RESEARCH ON ASEISMIC PERFORMANCE OF PRC COUPLING BEAM-HYBRID COUPLED SHEAR WALL SYSTEM

PRC coupling beam-hybrid coupled shear wall system is a new structural system formed by replacing the concrete coupling beam with the plate-reinforced composite (PRC) coupling beam in traditional reinforced concrete coupled shear walls. It is still lack of systematic research on its aseismic behavior. Therefore, based on the aseismic performance study of the PRC coupling beam with a small span-to-depth ratio, the BS basic model specimen of the PRC coupling beam-hybrid coupled shear wall system is designed. The aseismic behavior of the PRC coupling beam-hybrid coupled shear wall system is analyzed by using the finite element software. The stress distribution of steel plates, reinforcing bars in coupling beams and concrete is investigated. Meanwhile, the plastic hinges developing law of this hybrid coupled shear wall system is also studied. Further, the influence of a coupling ratio, the section size of a coupling beam, the height-width ratio of a single side wall, the total height of a structure, and the role of a slab on the aseismic behavior of the new structural system is studied. It is recommended that the reasonable coupling ratio for the PRC coupling beam-hybrid coupled shear wall system in a high intensity seismic fortification area is from 40% to 60%.